-
-
/** - * An example
- *
- * A farm wants to sell fruits to the market
- * There are three kinds of fruits on the farm, apples and grapes
- * We imagine: 1. Fruits have many attributes, and each attribute is different, but they have Common place | Growing, planting, receiving, eating
- * 2. New fruits may be added in the future. We need to define an interface to standardize the methods they must implement
- * 3. We need to obtain the class of a certain fruit, You need to get examples of a certain fruit from the farmer to know how to grow, plant, harvest and eat
- */
/** - * Virtual product interface class
- * Define the methods that need to be implemented
- */
interface fruit{ /** - *Growth
- */
- public function grow();
/** - *Planting
- */
- public function plant();
/** - * Harvest
- */
- public function harvest();
/** - * Eat
- */
- public function eat();
-
- }
/** - * Define the specific product category Apple
- * First, we need to implement the methods defined by the inherited interface
- * Then define Apple-specific attributes and methods
- */
- class apple implements fruit{
//苹果树有年龄 - private $treeAge;
//苹果有颜色 - private $color;
public function grow(){ - echo "grape grow";
- }
public function plant(){ - echo "grape plant";
- }
public function harvest(){ - echo "grape harvest";
- }
public function eat(){ - echo "grape eat";
- }
//取苹果树的年龄 - public function getTreeAge(){
- return $this->treeAge;
- }
//设置苹果树的年龄 - public function setTreeAge($age){
- $this->treeAge = $age;
- return trie;
- }
} /** - * Define the specific product class Grape
- * First, we need to implement the methods defined by the inherited interface
- * Then define the unique attributes and methods of Grape
- */
- class grape implements fruit{
//葡萄是否有籽 - private $seedLess;
public function grow(){ - echo "apple grow";
- }
public function plant(){ - echo "apple plant";
- }
public function harvest(){ - echo "apple harvest";
- }
public function eat(){ - echo "apple eat";
- }
//有无籽取值 - public function getSeedLess(){
- return $this->seedLess;
- }
//设置有籽无籽 - public function setSeedLess($seed){
- $this->seedLess = $seed;
- return true;
- }
- }
/** - *Farmer class is used to obtain instantiated fruits
- *
- */
- class farmer{
//定义个静态工厂方法 - public static function factory($fruitName){
- switch ($fruitName) {
- case 'apple':
- return new apple();
- break;
- case 'grape':
- return new grape();
- break;
- default:
- throw new badFruitException("Error no the fruit", 1);
- break;
- }
- }
- }
class badFruitException extends Exception{ - public $msg;
- public $errType;
- public function __construct($msg = '' , $errType = 1){
- $this->msg = $msg;
- $this->errType = $errType;
- }
- }
/** - * Method to obtain fruit instantiation
- */
- try{
- $appleInstance = farmer::factory('apple');
- var_dump($appleInstance);
- }catch(badFruitException $err){
- echo $err->msg . "_______" . $err->errType;
- }
-
-
|
